Mr. K. Shelford's Stiidies of the Blattidm. 239 



lamina; cerci elongate. Wings with median and ulnar veins simple, 

 reaching the outer margin of the wing, anterior to the somewhat 

 inconspicuous apical triangle. 



Escala circwnduda, Wlk. (Plate XV, fig. 4.) 

 Blatta circumduday Walker, Cat. Blatt. B. M, Suppl. 

 p. 142 (1869). 



^ . Testaceous. Head rufo-castaneous ; antennas, palpi clypeus 

 testaceous. Pronotum with the disc rufous, lateral and anterior 

 margins hyaline and a central testaceous macula. Tegmina with 

 twelve costal veins, mediastinal vein bifurcate, radial vein with 

 extremity ramose. Wings clear hyaline, with ten costal veins, 

 radial vein bifurcate near the apex, apical triangle elongate but 

 narrow, first axillary vein tri-ramose. Posterior femora with three 

 s^iines on anterior margin beneath, four on posterior margin ; 

 formula of apical spines, {, |, }, no genicular spine on anterior femora . 

 Supra-anal lamina produced, triangular, but doubled on itself so 

 that in dorsal view the apex cannot be seen and the lamina apj^ears 

 then to be short and transverse. Sub-genital lamina ample, semi- 

 circular in outline. The left style acuminate, the right absent, the 

 lobe bearing five curved hooks bent over the edge of the sub-genital 

 plate. Cerci elongate. 



Total length 14 mm. ; length of tegmina ITS mm. 



Adelaide, S. Austealia. Five specimens, including 

 the type (Oxford Museum). 



Escala longiuscula, Wlk. (Plate XV, fig. 5.) 

 Blatta longmsctda, Walker, Cat. Blatt. B. M. Suppl. 

 p. 143 (1869). 



o . Testaceous ; head rufo-testaceous ; lateral and anterior mar- 

 gins of pronotum hyaline. Tegmina with nineteen costal veins, 

 radial vein not bifurcate, not ramose at extremity, anterior ulnar 

 vein bifurcate, posterior ulnar multi-ramose. Wings as in preceding 

 species. Posterior femora with five spines on each margin beneath, 

 formula of apical spines \, \, i, genicular spines on all the femora. 

 Supra-anal lamina produced, trigonal ; sub-genital lamina as in the 

 preceding species, the right style absent, the lobe modified to form 

 a stout double-pointed hook ; cerci elongate, their apices curved 

 downwards. 



Total length 13 mm.; length of tegmina 11 mm. 



Adelaide. Four examples, including the type (Oxford 

 Museum). 



